Convert 18 nmi to km

How to convert nautical miles to kilometers

1. Formula: kilometers = nautical miles × 1.852
2. Put in the value: 18 nautical miles.
3. Result: 33.336 kilometers.

Nautical miles to kilometers table

Converting the other way: kilometers to nautical miles

nautical miles = kilometers × 0.5399568. So 33.336 kilometers is back to 18 nautical miles; one kilometer is 0.5399568 nautical miles. See the kilometers to nautical miles table.

Quick estimate in your head

For a rough answer, multiply by about 1.9: 18 × 1.9 ≈ 34.2 km, against the exact 33.336 km (2.6% out). Good enough to check that a calculated result is sensible.

Common mistakes

The usual slip is using the factor the wrong way round. A nautical mile is bigger than a kilometer, so the number of kilometers must come out larger than the number of nautical miles. If your answer goes the other way, divide instead of multiplying.

About the units

Nautical mile (nmi) and kilometer (km) are both units of length. One nautical mile equals 1.852 kilometers, and one kilometer equals 0.5399568 nautical miles. Results on this page are rounded for display; the conversion itself uses the exact definitions.

Length conversions come up in DIY and building plans, running and cycling distances, maps, clothing sizes and travel between countries that use metric and imperial units.

18 nautical miles in other units

The most readable unit for this amount is nautical miles (18).

• 33,336,000 mm
• 3,333,600 cm
• 33,336 m
• 33.336 km
• 1,312,440.94 in
• 109,370.08 ft
• 36,456.69 yd
• 20.71403 mi
• 18,228.35 fm
• 33,336,000,000 um